JP6693449B2 - Laser processing equipment, processing data generation equipment - Google Patents

Description

  The present invention relates to a laser processing device and a processing data generation device.

  Patent Document 1 describes a laser processing apparatus that irradiates a laser beam on a processing object to print a processing pattern such as letters and numbers on the processing object. In the laser processing device described in Patent Document 1, a plurality of annular processing lines are set in the processing region of the processing pattern, and the annular processing lines are set in the direction along the outer contour of the processing pattern. With this setting, the ratio of the time to irradiate the laser when painting the inside of the outer contour of the processing pattern is often larger than the scanning method that scans in a raster in one direction, and it is possible to fill at high speed. Was becoming. The laser processing apparatus described in Patent Document 1 irradiates a laser beam on the set plurality of processing lines to print a processing pattern.

JP, 2012-24812, A

  However, in the laser processing apparatus described in Patent Document 1, the scanning directions of the plurality of annular processing lines are the same. The laser processing device described in Patent Document 1 scans a plurality of annular processing lines in the same direction. When a plurality of annular processing lines are scanned in the same direction to process the processing areas of the processing pattern, the processed surfaces have different characteristics in different areas of the processing areas.

  FIG. 10 is a cross-sectional view in the case of scanning in opposite scanning directions, and a diagram showing the difference in the reflected light amount when observing them in a certain direction. When swept from left to right, in most materials, most of the irradiation marks have a fluffy shape to the left, and when observing this with the light in the upper right of the figure, the angle of the irradiation marks is vertical from the observed upper right. It has a close shape, and because it observes a larger amount of light than when observed from the upper right, it looks bright. On the other hand, in the case of sweeping from right to left, the angle of the irradiation mark becomes nearly horizontal from the observed upper right, and on the contrary, a little light is observed and it looks dark. This is the reason why the appearance differs depending on the scanning direction.

  When performing the ring-shaped filling in this way, if each adjacent ring is scanned in the same direction, there is a problem that the appearance varies depending on the location for the above reason.

  The object of the present invention was proposed in view of the above problems, in the case of printing a processing pattern by irradiating a laser beam on a plurality of annular processing lines, reflection after processing in the processing region. It is an object of the present invention to provide a laser processing apparatus and a processing data generation apparatus that can suppress the difference in characteristics and obtain a uniform printing result.

  A laser processing apparatus according to the present application, a laser beam emitting unit for emitting a laser beam for performing laser processing on an object to be processed, a scanning unit for scanning the laser beam, and condensing the laser beam scanned by the scanning unit. The condensing unit, the controller that controls the laser light emitting unit and the scanning unit based on the processing data, and the controller that is used to process the object from the processing pattern drawn on the object. And a processing data generation unit that generates processing data for generating the processing data, and the processing data includes a plurality of scanning lines formed based on the processing pattern and formed as a ring along the contour of the processing pattern. The scanning direction of a line is opposite to the scanning direction of another adjacent scanning line.

  Further, the processing data generation device according to the present application, a laser beam emitting unit that emits a laser beam for performing laser processing on the object to be processed, a scanning unit that scans the laser beam, and the scanning unit that is scanned by the scanning unit. An apparatus for generating processing data used in a laser processing apparatus, comprising: a condensing unit that condenses laser light; and a controller that controls the laser light emitting unit and the scanning unit based on the processing data. A processing data generation unit that generates processing data used by the controller to process the processing target from the processing pattern drawn on the processing target, and the processing data is based on the processing pattern. The plurality of scanning lines are formed as a ring along the contour of the processing pattern to be generated, and the scanning direction of the plurality of scanning lines is opposite to the scanning direction of other adjacent scanning lines. And it has a direction.

  According to the present invention, even when a processing pattern is printed by a plurality of annular lines, it is possible to suppress the difference in characteristics due to the location after processing within the processing area, and the appearance is uniform regardless of location. become.

It is a figure which shows schematic structure of the laser processing apparatus of this embodiment. It is a block diagram which shows the electric constitution of the laser processing apparatus of this embodiment. It is explanatory drawing for demonstrating the hatching system by the laser processing apparatus of this embodiment. It is a part of the flowchart which shows an example of control of the laser processing apparatus of this embodiment. It is a part of the flowchart which shows an example of control of the laser processing apparatus of this embodiment. It is the figure which showed the outline of the generation method of the inside process data with respect to an outer contour. It is the figure which showed the outline of the deletion correction method in the case of crossing or passing each other with the hole-shaped pattern of an inner contour at the time of generation of inside process data. It is the figure which showed the outline of the deletion correction method at the time of the production | generation of the inside process data, when an annular contour line crosses or passes each other. It is the figure which showed the outline of the production | generation completion condition of the inside process data. FIG. 3 is a cross-sectional view when scanning in opposite scanning directions and a diagram showing a difference in reflected light amount when observing them in a certain direction.

  Hereinafter, a laser processing apparatus and a processing data generation apparatus according to the present invention will be described in detail with reference to the drawings based on one embodiment. First, a schematic configuration of the laser processing apparatus 1 according to the present embodiment will be described based on FIG. As shown in FIG. 1, the laser processing apparatus 1 according to this embodiment includes a print information creating apparatus 2 including a personal computer, a laser processing apparatus main body 3, and a laser controller 6.

  The laser processing apparatus main body 3 performs a marking process by two-dimensionally scanning the processing surface 7A of the processing object 7 with the laser light L. The laser controller 6 is composed of a computer, is connected to the print information creation device 2 so as to be capable of bidirectional communication, and is electrically connected to the laser processing device body 3. Then, the laser controller 6 drives and controls the laser processing apparatus main body 3 based on the print information, control parameters, various instruction information, etc. transmitted from the print information creating apparatus 2.

  A schematic configuration of the laser processing apparatus body 3 will be described with reference to FIG. In the description of the laser processing apparatus main body 3, the left direction, the right direction, the upward direction, and the downward direction in FIG. 1 are the front, rear, upward, and downward directions of the laser processing apparatus main body 3, respectively. Therefore, the emission direction of the laser beam L (pulse laser) of the laser oscillator 21 is the forward direction. The direction perpendicular to the main body base 11 and the laser light L is the vertical direction. The direction perpendicular to the vertical direction and the front-back direction of the laser processing device body 3 is the left-right direction of the laser processing device body 3.

   As shown in FIG. 1, the laser processing apparatus main body 3 includes a main body base 11, a laser oscillation unit 12 that emits a laser beam L, an optical shutter portion 13, an optical damper (not shown), and a half mirror (not shown). The guide light unit 15, the reflection mirror 16, the optical sensor 17, the galvano scanner 18, the fθ lens 19 and the like, and is covered with a substantially rectangular parallelepiped casing cover (not shown).

  The laser oscillation unit 12 includes a laser oscillator 21, a beam expander 22, and a mount 23. The laser oscillator 21 includes a laser medium and a passive Q switch. The laser medium is excited by the excitation light emitted from the excitation semiconductor laser (not shown) via the optical fiber 14, and oscillates the laser light. The passive Q switch functions as a Q switch that oscillates the laser light oscillated by the laser medium as a pulsed pulse laser. Therefore, the laser oscillator 21 oscillates a pulse laser through the passive Q switch and outputs a laser beam L (pulse laser) for performing marking (printing) processing on the processing surface 7A of the processing target 7.

  The beam expander 22 adjusts the beam diameter of the laser light L (for example, expands the beam diameter), and is provided coaxially with the laser oscillator 21. The mounting base 23 is mounted with the laser oscillator 21 so that the optical axis of the laser light L can be adjusted, and is fixed to each upper surface of the main body base 11 on the rear side of the center position in the front-rear direction by each mounting screw 25.

  The optical shutter unit 13 includes a shutter motor 26 and a flat plate-shaped shutter 27. The shutter motor 26 is composed of a stepping motor or the like. The shutter 27 is attached to the motor shaft of the shutter motor 26 and rotates coaxially. When the shutter 27 is rotated to a position that blocks the optical path of the laser light L emitted from the beam expander 22, it reflects the laser light L to an optical damper provided to the right of the optical shutter unit 13. .. On the other hand, when the shutter 27 is rotated so as not to be located on the optical path of the laser light L emitted from the beam expander 22, the laser light L emitted from the beam expander 22 is emitted from the front side of the optical shutter unit 13. It is incident on the half mirror arranged at.

  The light damper absorbs the laser light L reflected by the shutter 27. The optical damper is cooled by a cooling device (not shown). The half mirror is arranged so as to form an angle of 45 degrees in the diagonal left front direction with respect to the optical path of the laser light L. The half mirror transmits almost all of the laser light L incident from the rear side. Further, the half mirror reflects a part of the laser light L incident from the rear side, for example, 1% of the laser light L, to the reflection mirror 16 at a reflection angle of 45 degrees. The reflection mirror 16 is arranged leftward with respect to the substantially central position of the rear side surface on which the laser light L of the half mirror is incident.

  The guide light unit 15 collimates the visible laser light emitted from the visible semiconductor laser 28 (see FIG. 2) that emits visible laser light, which is visible coherent light, such as red laser light, into parallel light. It is composed of a lens group (not shown) that converges. The visible laser light has a wavelength different from that of the laser light L emitted from the laser oscillator 21. The guide light unit 15 is arranged rightward with respect to the substantially central position where the laser light L of the half mirror is emitted. As a result, the visible laser light is made incident on the front side surface of the half mirror, that is, the reflecting surface at an incident angle of 45 degrees at a substantially central position where the laser light L of the half mirror is emitted, and the reflection angle of 45 degrees. Is reflected on the optical path of the laser light L.

  Here, the reflectance of the half mirror has wavelength dependence. Specifically, the half mirror has a surface treatment of a multilayer film structure of a dielectric layer and a metal layer, has a high reflectance with respect to the wavelength of visible laser light, light of other wavelengths It is configured to be almost transparent (99%).

  The reflection mirror 16 is arranged so as to form an angle of 45 degrees obliquely to the left front with respect to the front-back direction parallel to the optical path of the laser light L, and one of the laser light L reflected on the rear side surface of the half mirror. The part is incident at an incident angle of 45 degrees with respect to the substantially central position of the reflecting surface. Then, the reflection mirror 16 reflects the laser light L incident on the reflection surface at an incident angle of 45 degrees in the front direction at a reflection angle of 45 degrees.

  The optical sensor 17 is composed of a photodetector or the like that detects the emission intensity of the laser light L, and is arranged in the front side direction in FIG. 1 with respect to the substantially central position where the laser light L of the reflection mirror 16 is reflected. As a result, the optical sensor 17 receives the laser beam L reflected by the reflection mirror 16, and detects the emission intensity of the incident laser beam L. Therefore, the emission intensity of the laser light L output from the laser oscillator 21 via the optical sensor 17 can be detected.

  The galvano scanner 18 is attached to the upper side of a through hole formed at the front end of the main body base 11, and directs the laser light L emitted from the laser oscillation unit 12 and the visible laser light reflected by the half mirror downward. Two-dimensional scanning is performed. In the galvano scanner 18, the galvano X-axis motor 31 and the galvano Y-axis motor 32 are attached to the main body portion 33 by being fitted into the respective mounting holes from the outside so that the respective motor axes are orthogonal to each other. The scanning mirrors attached to the tip end face each other inside. Then, the rotation of each of the motors 31 and 32 is controlled to rotate each of the scanning mirrors, so that the laser light L and the visible laser light are two-dimensionally scanned downward. This two-dimensional scanning direction is the front-back direction (X direction) and the left-right direction (Y direction).

  The fθ lens 19 focuses the laser light L two-dimensionally scanned by the galvano scanner 18 and the visible laser light on the processing surface 7A of the processing target 7 arranged below. Therefore, by controlling the rotations of the respective motors 31 and 32, the laser light L and the visible laser light are moved in the front-back direction (X direction) and the left-right direction (X direction) in a desired processing pattern on the processing surface 7A of the processing object 7. Two-dimensional scanning is performed in the Y direction).

  Next, the circuit configuration of the print information creation device 2, the laser processing device main body 3, and the laser controller 6 that constitute the laser processing device 1 will be described with reference to FIG. First, the circuit configurations of the laser processing apparatus body 3 and the laser controller 6 will be described with reference to FIG.

  As shown in FIG. 2, the laser processing apparatus body 3 is composed of a galvano controller 35, a galvano driver 36, a laser driver 37, a semiconductor laser driver 38, and the like. A galvano controller 35, a laser driver 37, a semiconductor laser driver 38, an optical sensor 17, a shutter motor 26, etc. are electrically connected to the laser controller 6. Further, the print information creation device 2 is connected to the laser controller 6 so as to be capable of bidirectional communication, and the processing pattern transmitted from the print information creation device 2, the control parameters of the laser processing device main body 3, and various instruction information from the user. Etc. are configured to be able to be received.

  The laser controller 6 is provided with a CPU 41, a RAM 42, a ROM 43 as a calculation device and a control device for controlling the whole of the laser processing apparatus main body 3, a timer 44 for measuring time, and the like. Further, the CPU 41, the RAM 42, the ROM 43, and the timer 44 are connected to each other by a bus line (not shown) to exchange data with each other.

  The RAM 42 is for temporarily storing various calculation results calculated by the CPU 41, XY coordinate data of the processing pattern, and the like. The ROM 43 stores various programs, and stores various programs such as calculating the XY coordinate data of the processing pattern based on the print information transmitted from the print information creating apparatus 2 and storing the XY coordinate data in the RAM 42. ing. The ROM 43 stores, for each font type, data such as the start point, end point, focus, and curvature of the font of each character composed of a straight line and an elliptic arc.

  Further, in the ROM 43, the thickness, depth and number of processing patterns corresponding to the print information received from the print information creating device 2, the laser output of the laser oscillator 21, the laser pulse width of the laser light L, the laser by the galvano scanner 10 are provided. A program for storing various control parameters such as galvano scanning speed information indicating the speed of scanning the light L in the RAM 42 is stored.

  Then, the CPU 41 performs various calculations and controls based on various programs stored in the ROM 43. For example, the CPU 41 outputs, to the galvano controller 35, XY coordinate data of the processing pattern calculated based on the print information input from the print information creating device 2, galvano scanning speed information, and the like. The CPU 41 also outputs laser drive information such as the laser output of the laser oscillator 21 and the laser pulse width of the laser light L set based on the print information input from the print information creating device 2 to the laser driver 37. The CPU 41 outputs a laser output control signal of the laser oscillator 21 to the laser driver 37 based on the emission intensity of the laser light L input from the optical sensor 17.

  The CPU 41 outputs to the semiconductor laser driver 38 an ON signal for instructing to start lighting of the visible semiconductor laser 28 or an OFF signal for instructing to turn OFF the visible semiconductor laser 28. The CPU 41 instructs the shutter motor 26 to rotate the shutter 27 to a position that blocks the optical path of the laser light L, or to rotate the shutter 27 to a position that does not block the optical path of the laser light L. The release instruction signal for instructing is output.

  The galvano controller 35 calculates the angles and angular velocities of the galvano X-axis motor 31 and the galvano Y-axis motor 32 based on the XY coordinate data of the machining pattern, the galvano scanning speed information and the like input from the laser controller 6, and calculates the angle. , And outputs motor drive information indicating the angular velocity to the galvano driver 36. The galvano driver 36 drives and controls the galvano X-axis motor 31 and the galvano Y-axis motor 32 based on the motor drive information indicating the angle and the angular velocity input from the galvano controller 35, and outputs the laser light L and the visible laser light to 2 Dimension scan.

  The laser driver 37 drives the laser oscillator 21 based on the laser output of the laser oscillator 21, the laser driving information such as the laser pulse width of the laser light L, and the laser output control signal of the laser oscillator 21 which are input from the laser controller 6. To drive. Further, the semiconductor laser driver 38 drives or turns off the visible semiconductor laser 28 based on the ON signal or the OFF signal input from the laser controller 6.

  Next, the circuit configuration of the print information creation device 2 will be described with reference to FIG. As shown in FIG. 2, the print information creation device 2 includes a control unit 51 for controlling the entire print information creation device 2, an input operation unit 55 including a mouse 52 and a keyboard 53 shown in FIG. 1, a liquid crystal display ( The LCD 56 and the CD-ROM 57 include a CD-R / W 58 for writing and reading various data and programs. An input operation unit 55, a liquid crystal display 56, a CD-R / W 58, etc. are connected to the control unit 51 via an input / output interface (not shown).

  The control unit 51 includes a CPU 61, a RAM 62, a ROM 63 as an arithmetic unit and a control unit for controlling the entire print information creating apparatus 2, a timer 65 for measuring time, a hard disk drive (hereinafter referred to as “HDD”) 66, and the like. I have it. Further, the CPU 61, the RAM 62, the ROM 63, and the timer 65 are connected to each other by a bus line (not shown), and data is exchanged with each other. Further, the CPU 61 and the HDD 66 are connected via an input / output interface (not shown) to exchange data with each other.

  The RAM 62 is for temporarily storing various calculation results calculated by the CPU 61. The ROM 63 stores various programs.

  Further, the HDD 66 stores programs of various application software and various data files.

  Therefore, the control unit 51 constitutes the processed data generation unit of the present application. In the present embodiment, an example in which the control unit 51 configures the processed data generation unit of the present application will be described, but unlike this, the laser controller 6 may generate the processed data as the processed data generation unit.

  Here, how the pattern of the hatching method schematic diagram by the laser processing apparatus 1 of the present invention shown in FIG. 3 is preferably carried out by the processing data generation unit is a flowchart shown in FIGS. 4 and 5. The following is an example.

  In step S1 (hereinafter referred to as S1; other steps are the same), the control unit 51 extracts a vector indicating a contour (also referred to as an outer contour or a first contour) from the processing pattern. Extracting the vector indicating the contour means extracting the solid line portion of FIG. The solid line portion in FIG. 6A means the processing pattern that originally existed before the filling, and in this embodiment, the original processing pattern serves as the starting point and the filling algorithm is started. The processing pattern may be retrieved from a storage medium such as the ROM 63 or the CD-RW 58, or may be generated by the CPU 61 based on other information input.

  Next, in S2, the control unit 51 extracts a vector indicating a hole (also referred to as an inner contour or a second contour) from the processing pattern. Extracting a vector indicating a hole means extracting a vector outside the halftone dot, as shown in FIG. That is, the inner contour included in the region surrounded by the outer contour of the processing pattern is extracted. This extraction method may be a method of extracting the hole vector by using the information of the hole and the outer contour originally included in the processing pattern, or detecting the vector surrounded by the outer contour to determine the hole vector. A method of extracting may be used. If the hole vector is not extracted, this step is skipped.

  When the outer contour and the hole vector are extracted, the control unit 51 stores these in the storage area as processing data (also referred to as scanning line data) in S3. The storage area may be the RAM 62 or the HDD 66.

  Next, in S4 to S6, the control unit 51 generates a scanning line formed of a ring along the outer contour inside the outer contour. First, in S4, as shown in FIG. 6A, the control unit 51 calculates a vector parallel to the plurality of vectors forming the outer contour. For example, if the processed data is such that the right side of the vector forming the outer contour is always inside, a similar vector is added to the right side of each outer contour vector based on it. The addition position, that is, the fill density may be a predetermined fill density or a fill density input by the user. For example, the filling density may be determined such that the vector is added to a position where the distance from the outer contour vector is the same as the beam diameter of the laser light L on the processing surface 7A of the processing target 7.

  Next, in S5, the control unit 51 reverses the scanning direction of the scanning line generated inside the outer contour. That is, an operation of reversing the direction of all the vectors generated in the step of S4 is performed, and by this operation, the processing direction of each vector is also opposite to the direction of the outer contour vector. The operation of reversing this direction is the most important point of the present application, and by repeating the operation, processing data in which the directions of adjacent scanning lines are opposite to each other are generated. Therefore, it is possible to suppress the difference in the reflection characteristics after processing within the processing area of the processing pattern, and obtain a uniform printing result.

  Next, in S6, the control unit 51 extracts the intersection point of the vector generated in the step of S5, and makes a modification such that the extracted intersection point becomes the start point and the end point of the vector. An annular scan line is generated by connecting the plurality of generated vectors. This is shown in FIG. If there is no intersection due to an obtuse angle or the like between the outer contour vectors, the vector generated in step S5 is extended, and the point where the extended vector first intersects another vector is set as the intersection. The same processing is performed for each.

  In the present embodiment, the vector generated from the information of the outer contour vector is treated again as a new outer contour, and the same vector generation processing is repeated again. In S7, the control unit 51 stores the newly generated ring-shaped scanning line data in the storage area as processed data.

  Next, in S8, the control unit 51 determines whether or not there is a location where the generated annular scanning lines (vectors) intersect. FIG. 8A shows an example of such a state, and the continuously generated circular scanning lines intersect at two points indicated by dotted circles, and it is impossible to generate a vector with a specified fill density. It's impossible.

  When the control unit 51 determines that there is an intersection of the annular scanning lines (S8: YES), the intersection is extracted in S9, and the scanning line between the two intersections is deleted in S10. By this processing, a pattern as shown in FIG. 8B is obtained, and in this example, a phenomenon of splitting into two islands occurs. Each of these two islands has a new outer contour, and the same vector generation processing is performed again. Then, in S11, the control unit 51 corrects the ring-shaped scanning line data made up of the undeleted portions as the processed data. When the control unit 51 determines that the annular scanning line does not have the intersection (S8: NO), the process proceeds to S12 described below.

  In the previous section, an example of intersecting at two places was shown, but an example of intersecting (contacting) at only one place is shown in FIGS. 8C and 8D. The control unit 51 deletes the scanning line at the intersecting portion. As a result, FIG. 8 (c) becomes a pattern as shown in FIG. 8 (d), and even in this example, the phenomenon of splitting into two islands occurs. Each of these two islands has a new outer contour, and the same vector generation processing is performed again.

  Next, in S12, the control unit 51 determines whether the generated scanning line intersects the hole (inner contour). That is, as shown in FIG. 7A, when the inner scanning line (vector) is generated from the outer contour in the earliest period, the generated inner scanning line is not included in the holes originally present in the machining pattern. It is determined whether or not the vector group is crossed.

  When the control unit 51 determines that the scanning line and the hole intersect (S12: YES), the control unit 51 extracts the intersection at S13. Next, in S14, the control unit 51 deletes the vector group between the two points intersecting the vector group of the hole among the scanning lines. Then, in S15, the control unit 51 performs a correction to connect the vector group of the scanning line and the vector group of the hole (inner contour) which are not deleted in S14. As shown in FIG. 7 (b), each of the two islands becomes a new outer contour.

  Then, in S16, if the scanning line is modified in S11 or S15, the control unit 51 adds the modified scanning line to the drawing path. In S16, the control unit 51 adds the uncorrected scanning line to the drawing path unless the scanning line has been corrected in S11 or S15. After executing S16, the control unit 51 proceeds to the process of S17. If the control unit 51 determines that the scanning line and the hole do not intersect (S12: NO), the control unit 51 proceeds to S16.

  In the previous section, an example in which the generated vector crosses the hole vector group was shown, but an example in which the generated vector and the hole vector pass each other at one point is shown in Fig. 7 (c). And (d). In this case, by deleting the vector pattern of the passing portion, FIG. 7 (c) becomes a pattern as shown in FIG. 7 (d). As in the case of FIGS. 7 (a) and 7 (b), two patterns are obtained. Each of the islands has a new outer contour, and the same vector generation processing is performed again.

  Processing data for filling with a plurality of annular scanning lines is generated by repeating the processing of S4 to S16 on a single or a plurality of islands. The processed data composed of a plurality of annular scanning lines is stored in the storage area as a continuous scanning order from the outside.

  After the processing of S16 is executed, the control unit 51 determines whether or not the length of the scanning line in S17 is longer than that of the scanning line generated immediately before. As shown in FIG. 9, when the scanning lines are sequentially generated from the outer contour toward the inner side, as shown in FIG. When the processing is performed, the calculation result of the scanning line such as the dotted line in FIG. 9B is obtained, and the inversion phenomenon that the scanning line becomes long occurs.

  When the control unit 51 determines that the length of the scanning line has increased (S17: YES), the control unit 51 deletes the scanning line (the dotted scanning line in FIG. 9B) in S18 (FIG. 9B). 9 (c)).

  In the previous section, an example was shown in which whether or not to continue painting can be determined based on whether or not the length of the scan line has increased compared to the scan line created one time ago. Not exclusively. For example, it may be judged that further filling is impossible because the total extension of the ring of vectors generated immediately before is shorter than the total extension of the ring of vectors currently generated. Since the area of is smaller than the area in the ring of the currently generated vector, it may be judged that further filling is impossible.

  If the control unit 51 determines that the length of the scanning line has not increased (S17: NO), the process returns to S4 and repeats the processing. Then, the control unit 51 determines in S19 whether or not the above calculation has been executed for all the scanning lines, and when the calculation has been executed for all the scanning lines (S19: YES), the execution of the program is ended. .. If the control unit 51 determines in S19 that the above calculation has not been executed for all the scanning lines (S19: NO), the process returns to S4 and repeats the processing.

  The above is the description of the flow shown in FIGS. 4 and 5, but when two or more islands have been formed, even if the scanning order is changed so that each vector becomes a continuous scanning line, it is saved. Good. If the vectors are simply stored in the storage area in the order in which they are generated and scanning is performed, the irradiation position will move across the two or more islands each time one ring is scanned. Therefore, when each vector is stored in the storage area so that each island is scanned individually as much as possible, irradiation is performed by adding each vector to the vector group of the originating island, not at the end of the storage area. Since the islands are irradiated separately, the irradiation position is not frequently crossed, and the filling speed can be increased.

  Further, as shown in FIG. 3, a process of changing the print start position (indicated by a dot) may be performed for each annular scanning line. The laser irradiation conditions at the print start position may differ from the conditions at other locations depending on the characteristics of the laser and control. If the printing start positions of the respective annular scanning lines are the same as each other, the spots irradiated under conditions different from those of other spots will be arranged in a concentrated manner, resulting in non-uniform processing results. In order to reduce this, processing for shifting the print start position of each annular scanning line randomly or by user input may be performed.

  Unlike the present invention, when the scanning directions of the plurality of annular processing lines are the same, the scanning directions of the plurality of processing lines are all in the same direction in the area on one side of the center of the ring. .. On the contrary, in the area on the other side of the center of the ring, the scanning directions of the plurality of processing lines are all opposite to the one. When the scanning direction is different, the processing characteristics change, and the processed surface shows a reflection characteristic according to the scanning direction. If the scanning direction is different, different reflection characteristics appear for light from the same direction.

  On the other hand, in the present invention, the scanning directions of the adjacent annular processing lines are opposite to each other. As a result, the scanning direction of the plurality of processing lines in one area as viewed from the center of the ring includes both a certain direction and the opposite direction, and the scanning of the plurality of processing lines also in the other area as viewed from the center of the ring. The direction includes both a certain direction and the opposite direction. Therefore, the difference between the reflection characteristic of the area on one side and the reflection characteristic of the area on the other side becomes small. Therefore, when irradiating a laser beam on a plurality of annular processing lines to print a processing pattern, it is possible to suppress the difference in reflection characteristics after processing in the processing area and obtain a uniform printing result. Can be done.

1 Laser processing device 2 Printing information creation device (processing data creation device)
6 Laser controller 18 Galvano scanner (scanning section)
19 fθ lens (condenser)
21 Laser oscillator (laser light emitting part)
35 Galvano Controller 51 Control Unit (Processing Data Generation Unit)

Claims (8)

A laser light emitting portion for emitting a laser light for performing laser processing on an object to be processed,
A scanning unit that scans the laser beam;
A condensing unit that condenses the laser light scanned by the scanning unit,
A controller that controls the laser light emitting unit and the scanning unit based on processing data;
A machining data generator that generates machining data used by the controller to machine the machining object from the machining pattern drawn on the machining object,
The processing data includes a plurality of scanning lines formed based on the processing pattern and formed as a ring along the contour of the processing pattern, and the scanning direction of the plurality of scanning lines is another scanning line adjacent to each other. The laser processing apparatus is characterized in that the scanning direction is opposite to the scanning direction.   The processed data generation unit, based on a predetermined scanning line determined by the processing pattern, a scanning line generation process that generates an inner scanning line in the scanning direction along the predetermined scanning line inside the predetermined scanning line. The laser processing apparatus according to claim 1, further comprising: a scanning line adding process for adding the inner scanning line to the processing data.   The processed data generation unit, based on a predetermined scanning line determined by the processing pattern, a scanning line generation process that generates an inner scanning line in the scanning direction along the predetermined scanning line inside the predetermined scanning line. , A first determination process for determining whether or not the inner scanning line generated by the scanning line generation process has a crossing point, and the inner scanning line is crossed in the first determination process. When it is determined that there is no portion where the inner scanning line exists, it is determined that there is a portion where the inner scanning line intersects in the scanning line addition processing that adds the inner scanning line to the processed data and the first determination processing. The laser processing apparatus according to claim 1, wherein a scanning line correction process for deleting and modifying the scanning line is executed in such a case.   The processed data generation unit, based on a predetermined scanning line determined by the processing pattern, a scanning line generation process that generates an inner scanning line in the scanning direction along the predetermined scanning line inside the predetermined scanning line. A second determination process for determining whether or not the length of the inner scanning line generated by the scanning line generation process is shorter than the length of the predetermined scanning line; When it is determined that the length is shorter than the length of the predetermined scanning line, the length of the inner scanning line is the predetermined length in the scanning line addition process of adding the inner scanning line to the processed data and the determination process. 2. The laser processing apparatus according to claim 1, further comprising a scanning line deleting process for deleting the inner scanning line when it is determined that the length is equal to or longer than the length of the scanning line.   The processing data generation unit is a hole extraction process for extracting holes of the processing pattern based on the processing pattern, and a predetermined scanning line determined by the processing pattern, and an inner scanning line along the scanning line inside the scanning line. And a third determination process for determining whether or not the inner scanning line generated by the scanning line generation process has a portion intersecting with the hole extracted by the hole extraction process. In the third determination process, when it is determined that there is no portion where the inner scanning lines intersect, the scanning line addition process of adding the inner scanning line to the processed data and the inner determination line in the third determination process. 4. The laser processing apparatus according to claim 3, wherein when it is determined that the scanning lines intersect each other, a scanning line correction process is performed to delete and modify the scanning lines in the holes at the intersecting positions. ..   6. The processing data according to claim 1, wherein among the plurality of scanning lines, scanning lines and scanning lines within the scanning lines are stored in a continuous scanning order. The laser processing apparatus described in.   7. The laser processing apparatus according to claim 1, wherein the processing data has a different print start position for each of the plurality of scanning lines. A laser beam emitting unit that emits a laser beam for performing laser processing on an object to be processed, a scanning unit that scans the laser beam, and a condensing unit that condenses the laser beam scanned by the scanning unit, An apparatus for generating processing data used in a laser processing apparatus including a controller that controls the laser light emitting unit and the scanning unit based on processing data,
A processing data generation unit that generates processing data used by the controller to process the processing object from the processing pattern drawn on the processing object;
The processing data includes a plurality of scanning lines formed based on the processing pattern and formed as a ring along the contour of the processing pattern, and the scanning direction of the plurality of scanning lines is another scanning line adjacent to each other. A processing data generation device, characterized in that the scanning direction is opposite to the scanning direction.